Scag SFC-21 21in Commercial Walk Behind Mower, Honda GXV160, BBC - SFC-21-4GX
The Scag SFC-21 is a Walk Behind Mower designed to deliver professional quality-of-cut in a compact, 21in wide platform. This mower is ideal for both commercial and residential use, offering big productivity and versatility. With its powerful Honda GXV160 engine, the SFC-21 ensures ample power and exceptional efficiency in various cutting conditions.
The SFC-21 features a high-vacuum, high-capacity cutter deck made from 14-gauge stamped steel, ensuring strength and longevity. It also offers 3-in-1 versatility, allowing for mulching, bagging, and optional side discharging, making it a versatile tool for any lawn care task.
Features
- Professional quality-of-cut: Delivers a beautiful lawn with each use.
- 3-in-1 versatility: Capable of mulching, bagging, and optional side discharging.
- Powerful engine: Honda GXV160 engine provides ample power and efficiency.
- Durable construction: 14-gauge stamped steel cutter deck with replaceable guards.
- Easy height adjustment: Cutting heights from 1.5in to 4.5in in 0.5in increments.
- Efficient transmission: GT MG 512 transmission with 3-speed drive power.
- Safety features: Handle actuated operator presence system and Blade Brake Clutch (BBC).
Specifications
| Model |
SFC-21-4GX |
| Engine |
Honda GXV160 |
| Engine Type |
4-cycle gasoline, single cylinder, vertical shaft |
| Displacement |
163 cc |
| Governor |
Mechanical type with variable speed control |
| Idle Speed |
1500 RPM |
| Fuel |
Non-leaded gasoline, min. 87 octane |
| Lubrication |
Dual – full pressure and splash |
| Starter |
Recoil starter |
| Fuel Tank Capacity |
0.37 gal (1.4 liters), plastic |
| Cutter Deck Type |
High-vacuum, high-capacity |
| Deck Construction |
14-gauge deck, 14-gauge replaceable guards, deep draw stamped |
| True Cutting Width |
21 in |
| Cutting Height Adjustment |
1.5–4.5 in, 0.5 in increments |
| Cutter Blade |
0.1345 in thick, milled edge, wear resistant |
| Blade Engagement |
Blade control bar with Blade Brake Clutch (BBC) |
| Discharge Opening |
Rear-discharge, extra wide |
| Transmission |
GT MG 512, 3-speed |
| Transmission Output Shaft |
0.50 in diameter |
| Drive Control |
Variable drive control bar + 3-speed selector lever on handlebar |
| Forward Speed |
Up to 4.25 mph |
| Dimensions (Operating) |
Length: 63–68.5 in, Width: 23.25 in, Height: 32.75–43.5 in |
| Dimensions (Storage) |
Length: 41 in, Height: 22 in |
| Tracking Width |
21.2 in |
| Weight (without bagger) |
132 lb |
| Weight (with bagger) |
137 lb |
| Starter / Electrical |
Easy-Pull recoil start |
| Safety Group |
Handle actuated operator presence system |
| Steering / Travel Control |
Variable drive control bar + 3-speed selector lever on handlebar |
| Handlebars |
1 in diameter, thick-wall tubing, 3-position adjustable |
| Drive Wheels |
10.5 in x 3 in |
| Front Wheels |
9 in x 2.25 in |
What our Experts Think
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Dump-from-seat convenience = major time saver
Clam-shell design lets you empty the hopper with a simple lever—no need to leave the mower, boosting productivity on large jobs.
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High-capacity commercial collection
Large 12-bushel (112-gallon) hopper allows longer mowing intervals with fewer stops to unload debris.
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Advanced debris compaction system
Integrated blower shreds clippings, allowing 50%–100% more material to fit—maximizing efficiency per load.
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All-steel blower = durability + low maintenance
Belt-driven, steel blower system eliminates need for auxiliary engine—quieter, lighter, and more reliable over time.
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Automatic clean-out system
Built-in sweeper clears debris when dumping, ensuring the hopper empties fully and stays ready for the next pass.
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Quick install & removal
Tool-free removal with quick pins makes switching between bagging and discharge fast and hassle-free.
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Designed for productivity & balance
Compact vertical blower adds minimal width, while included counterweights maintain mower stability during operation.
Q&A
Q: What type of mower is the Scag SFC-21-4GX?
A: It’s a commercial walk-behind mower with a 21-inch cutting deck, designed for professional landscapers and tight-space mowing.
Q: What engine powers this mower?
A: Equipped with a Honda GXV160 engine, delivering reliable, consistent power, fuel efficiency, and smooth operation for commercial use.
Q: How effective is the cutting deck?
A: The 21-inch deck provides precise, clean cuts, perfect for sidewalks, narrow lots, and hard-to-reach areas.
Q: How maneuverable is the mower?
A: The walk-behind design offers excellent control in tight spaces, making it ideal for edging and navigating obstacles.
Q: What durability features does it have?
A: Built with a commercial-grade steel frame, reinforced deck, and heavy-duty components to withstand daily professional use.
Q: What applications is it suited for?
A: Ideal for commercial landscaping, sidewalks, narrow lots, and residential properties where precision and maneuverability are required.
Q: Does it include operator comfort features?
A: Yes. Features ergonomic handles, easy-start Honda engine, and smooth operation for reduced operator fatigue.
Q: Why choose the SFC-21 with Honda GXV160?
A: Combines premium Honda engine reliability, professional-grade construction, and precise 21-inch cutting for efficient, high-quality results in tight areas.
Maintenance Tips
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Change engine oil & filter: Follow Honda GXV160 recommended schedule (typically every 50 hrs).
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Clean/replace air filter: Keeps engine breathing freely and prevents performance loss.
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Sharpen or replace blades: Ensures clean, even cuts and reduces turf stress.
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Check tire pressure & wheel bearings: Maintains consistent deck height and smooth handling.
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Clean deck after each use: Remove grass buildup to prevent rust and improve airflow.
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Inspect belts & pulleys: Check for wear and proper tension to avoid slippage.
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Grease fittings & pivot points: Lubricate per service schedule to extend component life.
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Inspect spark plug & fuel system: Replace plug as needed; use fresh fuel to avoid starting issues.
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Test safety switches & controls: Confirm all operator safety systems are functioning before mowin
